28290220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{397}}^1\times {\mathrm{509}}^1$

素因数の和:922

約数の個数: 48

約数和(自身を含む): 68201280

約数和(自身を除く): 39911060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 397, 509, 794, 1018, 1588, 1985, 2036, 2545, 2779, 3563, 3970, 5090, 5558, 7126, 7940, 10180, 11116, 13895, 14252, 17815, 27790, 35630, 55580, 71260, 202073, 404146, 808292, 1010365, 1414511, 2020730, 2829022, 4041460, 5658044, 7072555, 14145110, 28290220]

約数ペア:

[(1, 28290220), (2, 14145110), (4, 7072555), (5, 5658044), (7, 4041460), (10, 2829022), (14, 2020730), (20, 1414511), (28, 1010365), (35, 808292), (70, 404146), (140, 202073), (397, 71260), (509, 55580), (794, 35630), (1018, 27790), (1588, 17815), (1985, 14252), (2036, 13895), (2545, 11116), (2779, 10180), (3563, 7940), (3970, 7126), (5090, 5558)]